<!DOCTYPE html>
<html class="reftest-wait" style="display: none">
  <head>
    <script>
      function doTest() {
        document.documentElement.style.display = "";
        document.documentElement.className = "";
      }
      window.addEventListener("MozReftestInvalidate", doTest, false);
    </script>
  </head>
  <body>
     <table style="position: absolute; top: 100px; left: 100px;">
       <tr>
         <td>
           <div style="position: absolute; left: 20px; top: 20px; background: black; height: 20px; width: 20px"></div>
         </td>
       </tr>
  </body>
</html>
